Screw down



Sept. 23, 1930. w, w. MOBANE ET AL SCREW-DOWN Filed Jan. 15, 1927 2 Sheets-Sheet 1 s R O N E V W a I Patented Sept. 23, 1930 UNITED si'n'ltrzs PATENT OFFICE.

wanna w. means, or rrr'rsauaen, AND cmamrca .r. KLEIN, or uneven, rnnnsnvama, ASSIGNORS 'ro umrnn nuemnname arm roummr comm, or rrrrsauaen, rannsrnvama, a coaroaarron or rnnnsrnvnua scanw DOWN Application filed January 15, 1927. Serial No. 181,887..

The present invention relates broadly to the art of metal rolling and more particularly to an improved form of screw down adapt- I able for use with rolling mills generally and [more particularly for use with sheet'or strip mills in which simultaneous or diiferential adjustment of the ends of a roll is desired or mafile necessary during the operation of a 10 In rolling mills, it-is customary to provide suitable mechanism for adjusting the rolls vertically during a rolling operation to thereby vary the distance between the rolls or to secure such an adjustment of the rolls as to 15 overcome the tendency of the material-being rolled to travel laterally due to the greater resistance afforded to the passage of material adjacent one end of the rolls than adjacent the opposite ends.

' N v The present invention has for one of its simultaneous or differential roll adjustment.-

Still another object ofthe present invention is to provide a screw down which may be as desired.

shown for purposes illustration only, a preferred embodiment of the present invention, it being understood that the drawings do not define the limits of our invention as changes in the construction, arrangement or assembly of the parts'disclosed therein may be made without departing either from the Y pirit of the invention or the scope of our broaderclaims. v i'Inthe-drawingszi Figure 1 is ato plan view of oneforni of rsw down embo ying the present invention; 7 v Fifi'e 2 is an end elevation of; the construction 1 lustrated in Figure 1 and, i

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0 erated at will either mechanically or manu-' a i n the accompanyin drawings, there is teeth into mesh. T e two motors rotate Figure 3 is a vertical sectional view through-a portion of the screw down of Figure 1.

The present invention is adaptable for use with mills of any desired type, whether of the two-hi h, three-high, four-high -or cluster type, t e particular construction of the mill bemg immaterial.

The present invention contemplates the provision of a suitable supportin framework 2 adapted to be modnted on t e housing 3 of a mill and extend transversely therebetween. Adjacent each end of the framework, there is a vertically extending screw shaft 4 having a threaded portion 5 working through a suitable nut 6 in the housing, the upper end of each of the screws besplined in known manner to receive a 7 carrying a worca wheel 8.

It will be apparent hat by simultaneousl rotating the two shafts 4 at thesame'spee the roll controlled thereby will be uniforml raised or lowered, while by effecting a di ferential movement of the shafts an angular raising or lowering of the roll may be accomplished. For rotating the worm wheels,

there are provided worms 9, suitably secured to shafts 10 which shafts at their outer ends ca gears 11 meshing with pinions 12. One of t e pinions 12 is arranged on a shaft extension 13 cou led to a motor 14 by a flexible coupling 15 w 'le the other pinion 12 is accured to the shaft extension 16 coupled to the armature of the motor 17 by suitable couplin 18. r

T e opposite ends of the armature shafts of the motors 14 and 17 respectively, each carry a section 19 of a magnetic or mechanical clutch of any well known construction of such nature that, when energized or operated it will be operative at any rotative position of the motors without delay and/or 'relativemovement between the clutch section such as are normall required to brin clutch u in unison in the same direction and thereby effect a uniform movement of the roll controlled thereby'. ,When the magneticclutch is d e-energized, the motors may operateat difierent speeds or in difierent directions to: Q

" thereby obtain an by a suitable clutch 23, it being obvious to desired differential adjustment of the r0 1.

Cooperating with the shaft extensions 13 and 16, may be brakes 20 of well known construction adapted to check the rotation of the motor armatures when the current thereto is cut off. In some cases, it is desirable to progressively raise or lower a roll by successive increments of movement such as occasioned by a single revolution of the armature shafts of the motors or by a predetermined number of revolutions thereof. Where such is the case, the respective shaft extensions will be provided with limit switches 21 of known construction set to automatically de-energize the motors upon the completion of the desired number of revolutions 'of their armature shafts. It will be apparent that a suitable control mechanism (not show may be provided, whereby the motors may be individually energized in known manner or whereby they may be simultaneously energized with the energization of the magnetic clutch.

As a safety factor, we prefer to provide each of the shaft extensions with a, hand wheel 22 adapted to be operatively connected to or disconnected from the shaft extensions those skilled in the art that when the adjustment of the rolls is being effected by the motors, the hand wheels should be disconnected.

The present invention enables a roll to be uniformly or angularly adjusted a predetermined or variable amount at will by either mechanical *or hand o erated means. Certain advantages arise rom the provision of a mechanism for accomplishing such a move-- ment, and more particularly from the pro- VISIOII of aplurality of individual adjusting mechanisms adapted to be operatively interconnected for simultaneous movement or dis- Y connected at will for individual movement.

y We claim: 1. A screw down mechanism, comprising roll boxes, two vertical screws engaging the tops of said roll boxes', a lurality of motor shafts adapted for simu taneous or individual operation, and hand means on each of said shafts normally operative] disconnected therefrom and adapted to o 2. Screw down mechanism for rolling mills comprising in combination two vertical screws mounted in the top of roll housings and each adapted to position vertically one end of a roll, a support extending from housmg to houslng, two motors on the said SUP! port having their shafts in line with each other, an electrically operated friction clutch connecting the said two motors and gearing connecting each of said motors with one of said screws. I

3. Screwdown mechanism for rolling mills comprising in combination two vertical screws mounted in the top of roll housings opera-' and each adapted to .position vertically one end of a roll, a-support extending from housing to housing, two motors on the said support having their shafts in line and adjacent to each other, a two part magnetic'clutch having one of its halves mounted on each of said motor shafts, andgearing connecting each of said shafts with one of said screws.

4. Screw down mechanism for rolling mills comprising in combination two vertical screws mounted in the top of roll housings and each adapted to position vertically one end of a roll, a pair of motors mounted on a support-resting on the housings, a countershaft for each of said motors, spur gears connecting each of said motors to its countershaft, a worm on each of said countershafts and a worm wheeloperatively .mounted on each of said screws and meshing with one of said worms. 7

5. Screw down mechanism for rolling mills comprising in combination two vertical screws mounted in the top of roll housings nections between each of said pinion shafts and one of said screws; the said support with the, motors, clutch, pinion shafts, brakes and handwheels forming a self contained unit which may be removed from the mill without disturbing other parts thereof. f

6. Screw down mechanism for rolling mills comprising in combination two vertical screws mounted in the top of roll housings and each adapted to position vertically one end of a roll, a pair of motors, a clutch connecting said motors, compound spur and worm gearing between each of said motors and one of said screws and an indicating .device for each ofsaid screws.-

7. Screw down mechanism for rolling mills comprisin in combination two vertical screws mounte in the top of roll housings and each adapted to position vertically one end of a roll, a support extending from housing to housing, a pair of motors mounted on the said support and in line with each other,

means for operating either of said motors separately, including an individual brake for each motor, a clutch for locking the motors together rotatively, and driving connections between each of said motors and one of said screws. 8. Screw down mechanism for rolling mills comprising in combination two vertical .screws mounted in the top of roll housings and each adapted to position verticall one end of a roll, a support extending from ousmg to housing and secured thereto, a pair of motors mounted with said support and symmetrically arranged about the center line of the mill,- a magnetic clutch connectin the shafts of the said motors, a pinion sha in attached shaft also supported by line with each of said motor shafts and coupled thereto and extending from its motor away from the center of the mill, a worm gear casing surrounding the upper end of each of the said screws and secured one to each roll housing, a worm wheel su ported in each of said casings andarran to rotate one of the said screws, a worm and itseach of said casings and arranged to drive one of the'said worm wheels, a spur gear on each of said wormshafts, a pinion on each of said pinion shafts engaging one of the said spur gears, a brake on each of said pinion shafts alrlidfia handwheel on each of said pinion s a s.

In testimony wherecf we have hereunto set our hands.

' WALTER W.'MOBANE.

CLARENCE J. KLEIN. 

